On each request to the Dashboard I get several of the following errors:
"Non-static method Piwik_Visualization_OpenFlashChart::esc() should not be called statically, assuming $this from incompatible context"
The errors occur from the calls on lines 1277, 1289, 1295, 1301, 1302, 1427, 1439, and 1445.
The issue is that Piwik_Visualization_OpenFlashChart::esc() is an instance method even though it does not use or affect any instance state. As such, it should be a static method.
I've attached a patch that makes the method static and thus prevents all the error messages.
I understand that this is really an issue with OpenFlashChart, and am going to submit it there as well. However, I think it should be fixed here in the meantime so that the log files do not fill up with unnecessary noise.
thanks for reporting, fixed in